Today I spent the afternoon installing the Farnam Battery Heating Pads I purchased from KTA-EV. What took the longest was lugging the batteries out from the basement out to the EV, then hoisting them into the EV.
This is my temperature control circuit for the heater pads. This is essentially a massive on/off switch that uses a temperature sensor set to a value that trips when it is reached, then it shuts off the AC power to the heaters. I have it set to 75F and it will reactivate at 71F. I have also a fuse, master on/off switch for the AC and a solid state relay that does the heavy work.
And here are the pads themselves, installed in the trunk. They are 35 watts each, and I have one under each battery.
I have to neaten up the electrical cord for the pads, so I shut them off for the night, but tomorrow I will sort that out and take the EV out for another drive, then apply the pads. Right now it is 35F out and 58F in my batteries, so I am curious to see how my new insulation packing will work out and check out the temps in the morning.
1 comment:
Your blog is amazing, i love the way you keep it updated, and it is in my favorite list.
I am from Pakistan and I often show your posts to my father. Hats off.
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